Nut-lock.



No 845,930. PA ENjTBDMAR. 5, 1907. T. E. QjIRD. NUT LOCK APPLIQATIVON Pn/E'p DEG. 121; 1900.

- naeeasso;

To all whom it may con cerni UNITED STATES PATENT OFFICE.

THOMAS EDMUND CURD, OFMORLEY, MISSou-nI, ASSIGNOR or ONE-FOURTH 'ro BENJAMIN F. EARLES, or MORLEY. MISSOURI,

Nun-Look.

Patented March 5. 1901' Application filed December 18, 1906. Serial No. 347,729.

-Be it known that I, THOMAS EDMUNn C RB, a citizen of the United States, residing at Morley, in the county of Scott and State of Missouri, have invented a new and useful N ut-Lock, of which the following is a specification. w The inventionrelate's to improvements in improve t nut-locks.

The obipct of the present invention is to e construction of nut-locks and to provide asimple and comparatively inexpen sive locking device designed for use on rail- ]o1nts, machinery, and other constructions subject to vibration and adapted for enabling a nut to be'readily locked to the bolt and ca-- pable of effectually preventing the former.

. the key in engagement withthe nut and the bolt to also serve as a nut-lock whereby. a

double lock-is providedfor holding the nut against rotary movement.

With these and other objects in view the invention consists inthe construction and v novel combination of'parts hereinafter fully described, illustrated the accompanying .drawing, and pointed out in the claim here- I view of a nut-lock constructed in accordance with this invention and shown applied to a bolt and a nut. Fig. 2 is a longitudinal sectional view of-the same. Fig. 3 is a trans.

verse sectional View onthe line 3 3 of 0c Fig. 4 is a detail perspective view of the and key.

' Like numerals of reference designate corresponding parts in all the figures of the drawmg. v i 1 designates a locking-key designed to be constructed either of malleable metal or spring metal and providedwith a radially-- arranged body portion 2, which extends through a nut 3 and engages a longitudinal groove iof a bolt 5. The nut is provided in .each of its faces with aradially-arranged transversely-disposed opening .6 to receive the body portion of the key, whereby the nut may be locked at each quarter-turn. In the accompanying drawing the key is shown ap plied to a square nut; but it is equally applione-third the diameter of the bolt, so as not 6 5 to materially weaken the same, andit extends longitudinally of the threaded portion a of the bolt, as clearly shown in Figs. 1 and 2 of the drawing.

' The body portion of the he islocked in engagement with the nut an the bolt by means of a Substantially U-shaped loop por-' tion 7, consisting of inner andouter sides 8 and 9 and a connecting portion 10. The outer portion 9 is arranged on the exterior of the nut and is disposed longitudinally'of I the bolt, extending from the key to the oute'r end fac e of the nut. The connecting portion -10 extends from the outer side Q of the loop to the groove l of the bolt, and theinner side 8'o 8 is located within the groove and extends from the outer end face of thenut to the body portion 2 of the key. The terminal of the inner side 8 abuts against the body ortion 2,

to directly engage the latter. By this construction the key provides a double lock for engaging the bolt, and the nut is securely held against rotary movement. I

When the key is constructed of malleable metal, it is applied to the nut in the form illustrated in 4 of the drawing, the 5 terminal; of the inner side 8 being spaced from the body portion 2 a sufiicient distance to permit the said body portion 2 to be insorted in one oi the holes 6 of the nut. The

loop is then tapped into the position shown Ioo in Fig. 2,, the inner side wall being driven into the groove 4-. until its end abuts a ainst thebody portion 2 at the inner en When the key is constructed of spring metal,

it will be applied to the bolt in the form iq5 shown in 2, but the loop will beco'n structed sufiiciently thin andresilient tOlQllr ableit to be opened wide enough to'adihit thereof. 1

of the introduction of the body portion. of the key in one of the openings or holes of the nut.

The resiliency oi the loop will then cause the inner side to spr ng into engagement with the bolt, when the inner side is carried to the groove.

The bolt and the nut are not materially weakened by the grmwe and the holes, and

when it is desired to remove the nut the loop may b readily Withdrawn from the groove y it suitable tool.

' The key for looking the nut on the bolt is hardly noticeable when applied to railjoints and other constructions where it is exposed to View, and even if it should. be no- 'ticed it would not be sufliciently understood to be unlocked, so that there will be no lie-- bility of unauthorised persons tampering n' and unlocking the nuts.

What I claim as new and desire to secure by Letters Patent, 1S

- In a nut-lock, the combination with a bolt Having thus fully described my invention,

having a longitudinal groove, and a nut have 7 ing a transverse opening, of a key consisting of a body portion extending through the opening of the nut and having its inner end arranged in the groove of the bolt, and a substantially U-shaped loop having inner and outer sides and a connecting outer pertion, the outer side of the loop being connected with the outer end of the said body portion and the inner side of the loop being arranged in the groove of the bolt and fitting against the said body portion of the key, whereby the loop is adapted to engage the bolt and also retain the key in engagement with the same in testimony that, I claim the foregoing as 

